How to throw an Exception with a certain HResult in C#?

How to throw an Exception with a certain HResult in C#?

In C#, you can throw an exception with a specific HResult value by creating a new instance of the exception and passing the HResult value to the constructor.

Here's an example:

try { // Some code that might throw an exception } catch (Exception ex) { int myHResult = -2146233088; // Specify your HResult value here throw new Exception("My custom message", ex) { HResult = myHResult }; }

In this example, we have a try-catch block that catches an exception. We then create a new instance of the Exception class, passing in a custom message and the caught exception as parameters.

We set the HResult property of the new exception to a custom HResult value, which in this case is -2146233088. This value can be any integer value that you choose.

Finally, we throw the new exception using the throw keyword.

When an exception is caught by an outer try-catch block, the HResult property of the caught exception can be checked to determine the cause of the exception. By specifying a custom HResult value, you can provide additional information about the exception that can be useful in debugging or troubleshooting.

Examples

  1. "Throw exception in async method using Task.FromException"

    • Description: Learn how to throw an exception in an async method using Task.FromException.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw an exception throw await Task.FromException<object>(new Exception("Exception thrown in async method.")); }

  2. "Async method throw custom exception using Task.FromException"

    • Description: Explore throwing a custom exception in an async method using Task.FromException.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw a custom exception throw await Task.FromException<object>(new CustomException("Custom exception thrown in async method.")); } public class CustomException : Exception { public CustomException(string message) : base(message) { } }

  3. "Async method throw exception with Task.Run"

    • Description: Learn how to throw an exception in an async method using Task.Run for synchronous exceptions.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw an exception using Task.Run throw await Task.Run(() => new Exception("Exception thrown in async method.")); }

  4. "Async method throw exception with Task.FromResult"

    • Description: Explore throwing an exception in an async method using Task.FromResult for synchronous exceptions.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw an exception using Task.FromResult throw await Task.FromResult<object>(new Exception("Exception thrown in async method.")); }

  5. "Async method throw exception with Task.Delay"

    • Description: Learn how to throw an exception in an async method after a delay using Task.Delay.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Delay and then throw an exception await Task.Delay(1000); throw new Exception("Exception thrown in async method after delay."); }

  6. "Async method throw exception with asynchronous Task.Run"

    • Description: Explore throwing an exception in an async method using Task.Run for asynchronous exceptions.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw an exception asynchronously using Task.Run throw await Task.Run(async () => { // Your asynchronous exception logic await Task.Delay(1000); return new Exception("Asynchronous exception thrown in async method."); }); }

  7. "Async method throw aggregate exception with multiple exceptions"

    • Description: Learn how to throw an AggregateException with multiple exceptions in an async method.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw an AggregateException with multiple exceptions throw new AggregateException( new Exception("Exception 1 thrown in async method."), new Exception("Exception 2 thrown in async method.") ); }

  8. "Async method throw exception with CancellationToken"

    • Description: Explore throwing an exception in an async method with a cancellation token.
    // Code Example public async Task<object> MyAsyncMethod(CancellationToken cancellationToken) { // Your async logic // Throw an exception with CancellationToken cancellationToken.ThrowIfCancellationRequested(); throw new Exception("Exception thrown in async method with CancellationToken."); }

  9. "Async method throw exception with custom async task"

    • Description: Learn how to throw an exception in an async method using a custom asynchronous task.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw an exception using a custom asynchronous task throw await CustomAsyncTask.ThrowAsync(new Exception("Exception thrown in async method.")); } public static class CustomAsyncTask { public static async Task<T> ThrowAsync<T>(Exception exception) { await Task.Delay(100); // Simulate asynchronous operation throw exception; } }

  10. "Async method throw exception with async lambda expression"

    • Description: Explore throwing an exception in an async method using an async lambda expression.
    // Code Example public async Task<object> MyAsyncMethod() { // Your async logic // Throw an exception using an async lambda expression throw await (async () => { await Task.Delay(1000); return new Exception("Exception thrown in async method using async lambda expression."); })(); }

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